package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    /**
     * 自定义删除
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<Dish>();
        //添加查询条件，根据id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId, id);

        //判断是否关联了菜品，如果已经关联，抛出业务异常
        if(dishService.count(dishLambdaQueryWrapper) > 0) {
            throw new CustomException("关联了菜品，不能删除");
        }
        //查询当前分类是否关联了套餐，如果已经关联，抛出业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId, id);
        if(setmealService.count(setmealLambdaQueryWrapper) > 0) {
            throw new CustomException("关联了套餐，不能删除");
        }

        //正常删除分类
        super.removeById(id);
    }
}
